Update+Upgrade broken by 404 errors

[Scott(0)]

On my system those two entries are listed a little differently:

http://dl.google.com/linux/talkplugin/deb/ stable main
http://dl.google.com/linux/chrome/deb/ stable main

I get no errors with the apt-get update command
Do you still get errors? It's not uncommon for a repository to go down for a little while.